Temperature responsive poly(phosphonate) copolymers: From single chains to macroscopic coacervates

Thomas Wolf; Johannes Hunold; Johanna Simon; Christine Rosenauer; Dariush Hinderberger; Frederik R. Wurm

doi:10.1039/c7py01811h

Temperature responsive poly(phosphonate) copolymers: From single chains to macroscopic coacervates

Thomas Wolf, Johannes Hunold, Johanna Simon, Christine Rosenauer, Dariush Hinderberger, Frederik R. Wurm^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

We present the first series of random poly(ethylene alkyl phosphonate) copolymers with either high solubility in water or a finely tunable hydrophilic-to-hydrophobic phase transition upon heating ("LCST"). Polymerization via the organocatalytic anionic ring-opening polymerization provided high control over molecular weight (up to 23000 g mol^-1) and copolymer composition, and resulted in narrow molecular weight distribution (< 1.3). Polymers of molecular weights up to 23000 g mol^-1 were obtained. The phase separation temperature was precisely adjusted in a range from 55 °C to 6 °C in water, depending on the copolymer composition. The phase transition mechanism was thoroughly investigated at different length scales via electron paramagnetic resonance spectroscopy (EPR), dynamic light scattering (DLS), UV-Vis spectroscopy and confocal laser scanning microscopy (cLSM), proving the step-wise formation of aggregates close to the cloud point temperature up to macroscopic coacervates.

Original language	English
Pages (from-to)	490-498
Number of pages	9
Journal	Polymer chemistry
Volume	9
Issue number	4
DOIs	https://doi.org/10.1039/c7py01811h
Publication status	Published - 28 Jan 2018
Externally published	Yes

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title = "Temperature responsive poly(phosphonate) copolymers: From single chains to macroscopic coacervates",

abstract = "We present the first series of random poly(ethylene alkyl phosphonate) copolymers with either high solubility in water or a finely tunable hydrophilic-to-hydrophobic phase transition upon heating ({"}LCST{"}). Polymerization via the organocatalytic anionic ring-opening polymerization provided high control over molecular weight (up to 23000 g mol-1) and copolymer composition, and resulted in narrow molecular weight distribution (< 1.3). Polymers of molecular weights up to 23000 g mol-1 were obtained. The phase separation temperature was precisely adjusted in a range from 55 °C to 6 °C in water, depending on the copolymer composition. The phase transition mechanism was thoroughly investigated at different length scales via electron paramagnetic resonance spectroscopy (EPR), dynamic light scattering (DLS), UV-Vis spectroscopy and confocal laser scanning microscopy (cLSM), proving the step-wise formation of aggregates close to the cloud point temperature up to macroscopic coacervates.",

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T1 - Temperature responsive poly(phosphonate) copolymers

T2 - From single chains to macroscopic coacervates

AU - Wolf, Thomas

AU - Hunold, Johannes

AU - Simon, Johanna

AU - Rosenauer, Christine

AU - Hinderberger, Dariush

AU - Wurm, Frederik R.

PY - 2018/1/28

Y1 - 2018/1/28

N2 - We present the first series of random poly(ethylene alkyl phosphonate) copolymers with either high solubility in water or a finely tunable hydrophilic-to-hydrophobic phase transition upon heating ("LCST"). Polymerization via the organocatalytic anionic ring-opening polymerization provided high control over molecular weight (up to 23000 g mol-1) and copolymer composition, and resulted in narrow molecular weight distribution (< 1.3). Polymers of molecular weights up to 23000 g mol-1 were obtained. The phase separation temperature was precisely adjusted in a range from 55 °C to 6 °C in water, depending on the copolymer composition. The phase transition mechanism was thoroughly investigated at different length scales via electron paramagnetic resonance spectroscopy (EPR), dynamic light scattering (DLS), UV-Vis spectroscopy and confocal laser scanning microscopy (cLSM), proving the step-wise formation of aggregates close to the cloud point temperature up to macroscopic coacervates.

AB - We present the first series of random poly(ethylene alkyl phosphonate) copolymers with either high solubility in water or a finely tunable hydrophilic-to-hydrophobic phase transition upon heating ("LCST"). Polymerization via the organocatalytic anionic ring-opening polymerization provided high control over molecular weight (up to 23000 g mol-1) and copolymer composition, and resulted in narrow molecular weight distribution (< 1.3). Polymers of molecular weights up to 23000 g mol-1 were obtained. The phase separation temperature was precisely adjusted in a range from 55 °C to 6 °C in water, depending on the copolymer composition. The phase transition mechanism was thoroughly investigated at different length scales via electron paramagnetic resonance spectroscopy (EPR), dynamic light scattering (DLS), UV-Vis spectroscopy and confocal laser scanning microscopy (cLSM), proving the step-wise formation of aggregates close to the cloud point temperature up to macroscopic coacervates.

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VL - 9

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JO - Polymer chemistry

JF - Polymer chemistry

IS - 4

ER -

Temperature responsive poly(phosphonate) copolymers: From single chains to macroscopic coacervates

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